How do I fix my home air conditioner?

I need help to fix my a/c. I car hear the power going to the unit ( a buzz sound ) but the blades are not moving. Also the house is not cooling. I have tried resetting it but just the same buzzing. Also when i put just the fan on the a/c I can hear it cut on in the house. Is there something wrong and what else can... show more I need help to fix my a/c. I car hear the power going to the unit ( a buzz sound ) but the blades are not moving. Also the house is not cooling. I have tried resetting it but just the same buzzing. Also when i put just the fan on the a/c I can hear it cut on in the house. Is there something wrong and what else can I do? Help!!
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